Optical characteristics of charge carrier transfer across interfaces between YB a2 C u3 O6+δ and L a0.7 C a0.3Mn O3

A. Seo; A. V. Boris; G. Cristiani; H. U. Habermeier; B. Keimer

doi:10.1103/PhysRevB.99.064501

Optical characteristics of charge carrier transfer across interfaces between YB a2 C u3 O6+δ and L a0.7 C a0.3Mn O3

A. Seo, A. V. Boris, G. Cristiani, H. U. Habermeier, B. Keimer

Producción científica: Article › revisión exhaustiva

6 Citas (Scopus)

Resumen

We report a spectral ellipsometry study of multilayers composed of superconducting YBa2Cu3O6+δ (YBCO) and ferromagnetic La0.7Ca0.3MnO3 (LCMO) in the spectral range 0.7-6.5 eV. With increasing YBCO sublayer thickness, the optical spectral weight is enhanced at photon energies of 1.5-3.5 eV. The spectral weight enhancement is proportional to the number of interfaces of each multilayer sample, indicating its association with the interfacial electronic structure. Based on calculations in the framework of a multilayer model, we find that the shape of the interface-induced spectral weight is consistent with transfer of hole carriers from YBCO to LCMO. Our results imply that the holes that are transferred across the interfaces accumulate in the LCMO layers, rather than being pinned by interfacial defects or annihilated by electron donors such as oxygen vacancies. Optical spectroscopy can thus serve as a nondestructive probe of charge transfer across buried interfaces in metal-oxide heterostructures.

Idioma original	English
Número de artículo	064501
Publicación	Physical Review B
Volumen	99
N.º	6
DOI	https://doi.org/10.1103/PhysRevB.99.064501
Estado	Published - feb 6 2019

Nota bibliográfica

Publisher Copyright:
© 2019 American Physical Society.

Financiación

We thank G. Khaliullin, V. Hinkov, and S. Okamoto for valuable discussions and Y. Matiks, P. Popovich, B. Bruha, H. Uhlig, and M. Schulz for assisting with experimental work. A.S. acknowledges support (Research Fellowship for Experienced Researchers) from the Alexander von Humboldt Foundation and NSF Grant No. DMR-1454200. B.K. acknowledges support from Deutsche Forschungsgemeinschaft Grant No. TRR80.

Financiadores	Número del financiador
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	DMR-1454200
Alexander von Humboldt-Stiftung
Deutsche Forschungsgemeinschaft	TRR80

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Acceder al documento

10.1103/PhysRevB.99.064501

Otros archivos y enlaces

Citar esto

@article{e21f13ce05334d9aacdafe9487287dda,

title = "Optical characteristics of charge carrier transfer across interfaces between YB a2 C u3 O6+δ and L a0.7 C a0.3Mn O3",

abstract = "We report a spectral ellipsometry study of multilayers composed of superconducting YBa2Cu3O6+δ (YBCO) and ferromagnetic La0.7Ca0.3MnO3 (LCMO) in the spectral range 0.7-6.5 eV. With increasing YBCO sublayer thickness, the optical spectral weight is enhanced at photon energies of 1.5-3.5 eV. The spectral weight enhancement is proportional to the number of interfaces of each multilayer sample, indicating its association with the interfacial electronic structure. Based on calculations in the framework of a multilayer model, we find that the shape of the interface-induced spectral weight is consistent with transfer of hole carriers from YBCO to LCMO. Our results imply that the holes that are transferred across the interfaces accumulate in the LCMO layers, rather than being pinned by interfacial defects or annihilated by electron donors such as oxygen vacancies. Optical spectroscopy can thus serve as a nondestructive probe of charge transfer across buried interfaces in metal-oxide heterostructures.",

author = "A. Seo and Boris, \{A. V.\} and G. Cristiani and Habermeier, \{H. U.\} and B. Keimer",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = feb,

day = "6",

doi = "10.1103/PhysRevB.99.064501",

language = "English",

volume = "99",

number = "6",

}

TY - JOUR

T1 - Optical characteristics of charge carrier transfer across interfaces between YB a2 C u3 O6+δ and L a0.7 C a0.3Mn O3

AU - Seo, A.

AU - Boris, A. V.

AU - Cristiani, G.

AU - Habermeier, H. U.

AU - Keimer, B.

PY - 2019/2/6

Y1 - 2019/2/6

N2 - We report a spectral ellipsometry study of multilayers composed of superconducting YBa2Cu3O6+δ (YBCO) and ferromagnetic La0.7Ca0.3MnO3 (LCMO) in the spectral range 0.7-6.5 eV. With increasing YBCO sublayer thickness, the optical spectral weight is enhanced at photon energies of 1.5-3.5 eV. The spectral weight enhancement is proportional to the number of interfaces of each multilayer sample, indicating its association with the interfacial electronic structure. Based on calculations in the framework of a multilayer model, we find that the shape of the interface-induced spectral weight is consistent with transfer of hole carriers from YBCO to LCMO. Our results imply that the holes that are transferred across the interfaces accumulate in the LCMO layers, rather than being pinned by interfacial defects or annihilated by electron donors such as oxygen vacancies. Optical spectroscopy can thus serve as a nondestructive probe of charge transfer across buried interfaces in metal-oxide heterostructures.

AB - We report a spectral ellipsometry study of multilayers composed of superconducting YBa2Cu3O6+δ (YBCO) and ferromagnetic La0.7Ca0.3MnO3 (LCMO) in the spectral range 0.7-6.5 eV. With increasing YBCO sublayer thickness, the optical spectral weight is enhanced at photon energies of 1.5-3.5 eV. The spectral weight enhancement is proportional to the number of interfaces of each multilayer sample, indicating its association with the interfacial electronic structure. Based on calculations in the framework of a multilayer model, we find that the shape of the interface-induced spectral weight is consistent with transfer of hole carriers from YBCO to LCMO. Our results imply that the holes that are transferred across the interfaces accumulate in the LCMO layers, rather than being pinned by interfacial defects or annihilated by electron donors such as oxygen vacancies. Optical spectroscopy can thus serve as a nondestructive probe of charge transfer across buried interfaces in metal-oxide heterostructures.

UR - http://www.scopus.com/inward/record.url?scp=85061365326&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061365326&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.99.064501

DO - 10.1103/PhysRevB.99.064501

M3 - Article

AN - SCOPUS:85061365326

SN - 2469-9950

VL - 99

JO - Physical Review B

JF - Physical Review B

IS - 6

M1 - 064501

ER -

Optical characteristics of charge carrier transfer across interfaces between YB a2 C u3 O6+δ and L a0.7 C a0.3Mn O3

Resumen

Nota bibliográfica

Financiación

ASJC Scopus subject areas

Acceder al documento

Otros archivos y enlaces

Huella

Citar esto